`ListRunnersOption` change omits consideration of Enterprise Runner

The following PR made changes to support query parameters, but appears to omit consideration of Enterprise Runner.
https://github.com/google/go-github/pull/3094

https://github.com/google/go-github/blob/51bedebff81b00a204050e6b50399f673f719b94/github/enterprise_actions_runners.go#L83